我正在使用xml-rs从tiled读取xml输出，这是用于游戏的二维级别/平铺地图编辑器。
我有我的解析方法，一切都开始了：
NameError uninitialized constant FormsController::ApplicationForm解析器变量创建为可变，并传递给next_tileset。还没有投诉。它崩溃的地方是next_tileset方法：
pub fn parse(path: String) {
let file = File::open(path).unwrap();
let file = BufReader::new(file);
let mut parser = EventReader::new(file);
let mut tilesets: Vec<TileSet> = vec![];
let mut tag_attributes: Vec<OwnedAttribute> = make_attributes();
let mut tag_name = String::from_str("");
{
let event = parser.next();
match event {
XmlEvent::StartElement { name, attributes, .. } => {
tag_name = name.local_name;
tag_attributes = attributes;
}
XmlEvent::EndElement {name, .. } => {
}
XmlEvent::Error(e) => {
println!("Error: {}", e);
}
_ => {}
}
}
if tag_name == "tileset" {
let tileset = next_tileset(&mut parser, &tag_attributes);
tilesets.push(tileset);
}
for tileset in tilesets {
println!("{}", tileset);
}
}
你会在循环中看到匹配，它会将解析器的可变引用传递给fn next_tileset(parser: &mut EventReader<BufReader<File>>, attributes: &Vec<OwnedAttribute>) -> TileSet {
let mut tileset = TileSet{ name: "".to_string(), imagesource: "".to_string(), imageheight: 0, imagewidth: 0, margin: 0, spacing: 0, tilewidth: 0, tileheight: 0, tiles: vec![] };
for attribute in attributes {
match attribute.name.local_name.as_ref() {
"name" => { tileset.name = attribute.value; },
"margin" => { tileset.margin = attribute_as_usize(&attribute.value); },
"spacing" => { tileset.spacing = attribute_as_usize(&attribute.value); },
"tilewidth" => { tileset.tilewidth = attribute_as_usize(&attribute.value); },
"tileheight" => { tileset.tileheight = attribute_as_usize(&attribute.value); },
_ => {}
}
}
loop {
let mut tag_name = String::from_str("");
let mut tag_type: Tag;
let mut tag_attributes: Vec<OwnedAttribute> = Vec::<OwnedAttribute>::new();
{
let event = parser.next();
match event {
XmlEvent::StartElement { name, attributes, .. } => {
tag_type = Tag::Open;
tag_name = name.local_name;
tag_attributes = attributes;
},
XmlEvent::EndElement { name, .. } => {
tag_type = Tag::Close;
tag_name = name.local_name;
},
_ => {
tag_type = Tag::Neither;
}
}
}
match tag_type {
Tag::Open => {
if tag_name == "image" {
parse_image(&mut tileset, &tag_attributes);
}
else if tag_name == "tile" {
let tile = next_tile(&mut parser, &tag_attributes);
tileset.tiles.push(tile);
}
},
Tag::Close => {
if tag_name == "tileset" {
break;
}
else {
continue;
}
},
Tag::Neither => {
continue;
}
}
}
return tileset;
}
。所以这就是它给出错误的地方。想知道它是否与使用BufReader的事实有关。